Add Gosper Curve

[trebeljahr]

Description

Add the Gosper Curve Fractal.

Inspiration

Wikipedia - Gosper Curve

Type

L-System

Difficulties

Centering this might be tricky. I didn't find a good way to do it, that's why I didn't include it in the Fractal Garden so far. But the L-System exists:

const gosperCurve = {
  maxIterations: 8,
  axiom: "XF",
  draw: drawRules,
  angle:  60,
  replace: {
    X: "X+YF++YF-FX--FXFX-YF+",
    Y: "-FX+YFYF++YF+FX--FX-Y",
  },
};